I think that depend on what you consider experimental. The music was certainly going for a different vibe, but basically every series of Macross does that. They want all their series to have a different sound.Pot wise Macross Delta's main run was considered too far from the franchise conventions by a lot of fans for how much it pushed things. I think, while I love Plus, it's sometimes held up as weirdly experimental and out there when really, while it was at the time an experiment, it's hardly the most ground breakingly unique piece of work ever or in the Macross franchise.
And I wouldn't be sure about things like westernising them anymore. Glow In The Dark was already almost entirely in English, as were several Walkure songs, and several Frontier songs, and I'd be wary of the idea that Japanese songs mean you can tell they're anime songs given "anime songs" these days run a massive specturm of genres and are more and more often written and produced by the same people who're writing producing and singing Japanese main stream songss or we're going to fall into all English songs are Disney territory.
Although, maybe I just don't care because I don't care what people think of my taste in music enough to care if they think it's anime or music or not whether it is or not.
For instance there's also Carol's absolute banger of a "I'm going to destroy the world because Daddy Issues" song, which is another of my all time favourites
And Mikua's "you keep getting hurt saving the world so I'll destroy the world" song
Both from the same anime and both have regular spots on my playlists and I would never describe them as "anime songs" as a genre and share them with non-anime people as unashamedly as the ones above.